diff --git a/sf_manufacturing/models/stock.py b/sf_manufacturing/models/stock.py
index 0c825fa3..2bf1ea35 100644
--- a/sf_manufacturing/models/stock.py
+++ b/sf_manufacturing/models/stock.py
@@ -355,9 +355,9 @@ class StockRule(models.Model):
                     )
                     for p in production_process:
                         logging.info('production_process:%s' % p.name)
-                        process_parameter = production_item.product_id.model_process_parameters_ids.filtered(
+                        process_parameters = production_item.product_id.model_process_parameters_ids.filtered(
                             lambda pm: pm.process_id.id == p.id)
-                        if process_parameter:
+                        for process_parameter in process_parameters:
                             i += 1
                             route_production_process = self.env[
                                 'mrp.routing.workcenter'].search(